Pump



2 SheAetS-Sheet Feb. 26, 1929.

J. H. HERMAN PUMP l gil/v r s Original Filed Nov. 20, 1926 2 Sheets-Sheet atroz nu* f J. H. HERMAN PUMP Orgir'lal Filed Nov. 20, 1926 Feb. 26, 1929'.

Patented Feb. 26, 1929. UNITED STATES 1,703,423 PATENT OFFICE.l

JOHN H. HERMAN, F LONG BECH, CALIFORNIA.

PUMP.

Refiled for abandoned application Serial No. 149,723, filed November 20, 1926.

' April 23, 1928. Serial No. 272,304.

This application is a substitutel for my abandoned application #149,723, iled Nov.

My invention relates to an improvement 1n deep well pumps of the reciprocating type l0 pumping of deep wells that sand. and mud'are included with-the oil and must be ycarried by the pump toV the surface. Breakin of the pump arises through the fact thatt e ordinary reciprocating pump will not operate successfully in mud or sand and will clog and cease toffunetion within a short time.

It is an object of my invention to provide a pump which will handle oil or water laden with sand and mud in such manner as to prevent the clogging of the apparatus during its operation. It is` my aim to provide a pump with means tol flush the working parts of thepump with liquid to carry away with the flushing liquid and kthe liquid being pumped, the sand and other detritus coming into the Well. y

It is also anobject to provide a pumping installation having means to clear the inletopenings to the pumpwhenever this becomes necessary and without removing the pump from the well.' i My invention resides in the particular construction and arrangement of the parts mak-` ing up the pump, and the details thereof will be set forth in the specification which follows. f Y

Referring to the drawing, Fig. 1 illustrates the upper end of the pump barrel and tubing, shown in central vertical section, and embodying my invention. Fig. 2 is the central section of the saidpump barrel, and Fig. 3 is the lower end of the pump, the pump being` shown as set vwithin a casing. Fig. 4 is a view of the lowerend of the pumping in ystallation sliowninv Fig. 3, with the outer walls of the by-passing shown as broken away. Figs. 5 and 6 are transverse sectionsl on the lines 5-5 and 6-6 respectively of Fig. 4. f Like` numerals of reference are einployed to designate like parts in all the views.

In the drawing,-the pump is shown as installed with an outer casing 1 which may be understood as being the usual sectional well.

casing, which serves to support and line the interior of the well. Said casing is perfo- This application filed rated at 2 toward the lower end to allow the inlet 'of oil or other liquid to the well.

Vithin the casing is the usual tubing 3 of the4 pump, the lower end of which is connected to a pump barrel 4 by means of a special coupling 5. kSaid pump barrel is of slightly largerdiameter than the tubingvandy includes within it a liner- 6, which is of the same inner diameter as the tubing and adapted to iit closely about the plunger. Said liner is set between the lower end of the coupling 5 anda similar coupling7 at its lower end. The coupling 7 connects the pump barrel with a short nipple 8 connected at it-s lower Lend within a swedged coupling 9. The coupling 5, previously referred to, may have a central opening therethrough at one side, threaded at 10 for connection Witha valve chamber '11, the lower end of which is directed downwardly and adapted to fit within the casing in the manner .shown in Fig. 1. ,v

The lower end of the valve chamber is threaded at 12 to connect with a tube, not shown,

which may be extended downwardly to any' desiredy depth and adapted'to convey away the 'gas which may accumulate in the well. The valve 'within the 'chamber serves to prevent -the liquid from the pump barrel escaping downwardly belowthe pump barrel.

i The swedged coupling 9-is connected with a packer made up of a pipe section 13, threaded at its upper an-d lower ends to connect with vthe swedged couplings 9 and'lll-respectively.'-l The packer formed upon` this pipe section may be of any preferred form. I have shown asleevc '15 on the'` pipe section, said ysleeve being of compressible material, such as rubber or similar composition, and'supported upon a tapered 'collar 16, which may be in turn-supported by toothed jaws 17, adapted to engage with the inner face of the casing,

as shown. The details of this packer need not be further described. It is contemplated that the passage of fluid outside the pump will be cut off at this point-by a packer of any preferred construction.

Below vthe packer I have shown the tubing 3 as extending 'downwardly and connected at its lower end to a special coupling member 18, similar in its make up to the coupling 5, previously described. It connects at its lower end with a vpump barrel 19 having a liner 2O inside the same, said liner being of the same interior diameter as the tubing and serving as a working barrel for the lower plunger.

The lower end o'l the pump barrel is connected with a housing 21 for a standing valve tor the pump. rlhe lower end of the housing is tapered downwardly and connected at its lower end with a strainer 22 perforated to allow the liquid to pass therethrough to the standing valve. y

The standing valve comprises a lower tapered bushing 23, threaded at its upper end for connection with the valve cage 24, serving to retain a valve seat 25 on the upper end ot the bushing. Within the valve cage is the usual ball valve 26. 'lhe `upper end oit the standing valve may be connected by means of a Garbot rod 27 to a head 28 within the lower end of the pump plunger, as will be more particularly set out.

rlhe lower end olf the strainer 22 is closed by means et a cap 29, which is hinged at one side, shown at BO, to open when desired. Said cap is held in place closing the lower end ot the strainer by means ot a spring 31. Said spring exerts a predetermined torce upon the cap 29, allowing the cap to open under the pressure or' fluid from the inside, when desired.

The ypump plunger is, in fact, a double plunger, having a reciprocating head within each of the two working barrels, above described. The upper plunger fitting within the working barrel 6 is of ordinary construction and h s a tubular head 32, shaped to lit closely within the liner 6 ot the working barrel. lts upper end is threaded lor connection with a valve housing 33 connected at its upper end with the valve cage 34, said cage serving to retain a valve seat 35 in position. A ball valve 86, within said seat, is limited in its movement by the valve cage 34, the upper end said sage being connected to a sucker rod 37 oi .the usual construction, extending upwar-dly to the surface.

The lower end of the plunger is threaded at its interior ttor engagement with a hollow sucker rod 38. Said rod extends downwardly through the packer and the tubing and is connected at its lower end to the upper end ot a valve housing 39 of the lower plunger. Said valve housing is made up of the section 39, which forms a part ot the plunger' and :lits closelyrwithin the liner 2O of the lower working barrel and a central section 40iconnecting the upper valve housing with the head 4l oit the plunger. l/Vithin the valve housing is a valve seat 42 and a ball valve 43 thereon. A 'transverse pin 44 through the valve housing limits the upward movement oit the ball valve The lower end ot the plunger has a threaded plug 45 screwed therein., the upper end ot said plug acting to eugage the head 28 olf the Garbot rod so as to withdraw ,the standing valve when the plunger withdrawn. rthus, also the raising ot' the standing valve allows iiushing fluid to enter and clean the strainer 22 below in an obvious manner. v

To flush the plunger and also to dilute the sand and mud-laden fluid, l provide means vtor directing flush water or similar liquid from the surface downwardly about the pump barrel. The tubing is spaced from the casing a material distance, forming a space '46 to allow passage' lor the flushing liquid. The swedged coupling 9 has pertorations 47 therein to allow the liquid to pass inwardly between the hollow pump rod 3S and the packer. Said liquid finds a passage withinthe tubing 3 to a point above the lower plunger and finds an outlet from' the tubing through an opening within the coupling member 18. The opening 50 connects with a closed passage 5l, which may be a separate pipe or may be made integral with the 'wall of the pump barrel 19, as shown in Fig. 5. Said passage leads downwardly to the lower end of the pump barrel and there connects with the pipe 52, which is recurved at its lower end andconnected through a valve chamber 53 to a pipe54 connected at its upper end with a passage 551 iorined upon the wall of the pump barrel and acting to convey the liuid to an opening 56 in the pump barrel 19 and the linerv 20. A ball valve 57 within the housing 53 pre-` vents the passage et liquid bacliwardly in an ,-b\.fious manner.. j Y I Y ln the operation of my pump, the principal suction .ei'lect is obtained almost entirely trom the lower plunger 4l. lt serves to suck in the liquid'through the strainer 2 2 and past the standing valve so as to torce it upwardly to the siirtace in the usual manner, theluid passing from the plunger upwardly through the hollow sucker rod 38 and the upper plunger and Ytrom thence through the tubing to the surface. The action oit' the upper plunger is mainly to prevent liquid being 'pumped trom passing downwardly into the tubing between the plungers where it might lind exit through the opening 47 above the packer. j f f The flushing tluidin Jthe casing may pass through the opening 47 andl thus pass the packer to the opening 50 and the by-pass made up ot' the passages 5l, 52, 54 and 55 to the i opening 56 in the pump barrel betweenlthe lower plunger and the standing valve.

l tormthe opening 56 at such a point in the pump barrel that it will be covered by the pump plunger during the larger portion of its s'rolre. The pump plunger will hence close the opening so that no fluid can find entrance to the pump barrel until the lower end ot the plunger has reached the pointA above the opening 56 and then the tluid will flow largely through the opening 56 alone. l wish it understood that the opening 56 is ot 'fairly large diameter, so that the flow ot liquid therethrough will be in comparatively Y lower pump barrels connectedin said large volume when the piston has passed this opening. It will be obvious, of course, that I can place the opening 56 at any point desired in the pump barrel to provide sufficient flow of flushing waterto accommodate the amount of mud and sand which is being pumped in the particular installation under consideration. If but little sand or mud is encountered, the opening 56 will be covered by the plunger through the larger partv of its stroke, but if the mud and sand is pumped in large quantities, the opening 56 may be placed somewhatlower in the barrel'so that it will be Opened in time to allow an inlet of a large quantity of the flushing fluid. 'I'his fluid will serve to dilute` the fluid being pumped and make it possible to lift it to the surface with little difficulty. The mud and sand will be carried away in such manner as to prevent clogging of the pump and will prevent the wear ordinarily caused by the sand collecting between the plunger and the working barrel and scoring the barrel and plunger. f c

The amount of fiushing liquid taken hin at the lower end of the pump barrel may be also regulated from the surface without change in the pump barrel by adjustingthe stroke communicated to the sucker rod. If

the sucker rod is raised slightly and givenl a shorter strolre, it will be possible to take .in relatively large quantities of flushing fluid.y

' tities of flushing fluid will be taken in. The

further advantages of this construction will be apparentto those skilled in the art.

What I claim as new and desire to protect by Letters Patent is:

l.. In va'pump, upper and lower pump barrels, a standing valve in said lower barrel, a pump plunger in each of said barrels, a hollow sucker rod connecting' the two plungers, said lower barrel having an opening in the side thereof above said standing valve, and means to permit flushing Huid to be forced into said ope-ning, said plunger controlling the saidopening to allowentrance of liquid only at the upper end of its stroke'. y v

2. In a pump, a pump tubing, upper and lower pump barrels therein, a standing valve in said lower barrel, a pump plunger in each of said barrels, a hollow sucker rod connecting the two plungers, a packer on said tubing between said pump barrels acting to close the passage of fluid outside said tubing, said lower barrel having an opening in rthe side thereof above said standing valve, and means to permit flushing fluid to be forced into said opening, said plunger controlling the said opening to allow entrance of liquid only at the upper end of its stroke. l

In pump, a pump tubing, upper and tubing and spaced apart, plungers in said pump barl rels, said plungers being connected, a packer on said tubing between said barrels, there being openings into said tubing above and below said packer, a standing valve, and means to permit flushing liquid to belforced into said lower pump barrel only at a point adjacent the upper end of thestrolce of said lower plunger, said openings alli'iwing passage of said liquid. y

4. In a pump, a pump barrel, a standing valve connected in the lower end thereof, a strainer below said standing valve, a cap on said strainer, means to hold said cap resilient ly in closed position, a pump plunger, means connecting said plunger and said standing valve whereby said standing valve may be raised with said plunger, and meansvto conduct flushing liquidpast said standing valve when it has been raised, to clean said strainer.

5. Ina pump, a pump barrel, a standing valve connected in the lower end thereof, a strainer below said standing valve, a cap on saidstrainer, meansvto hold said cap resiliently in closed position, a pump plunger, means connecting said plunger and `said standing valve whereby said standing valve may be raised with: said plunger, there being an opening in said pump barrel whereby liushin g liquid may be forced past said standing valve when it has been raised, to clean said strainer. A

6. A pump including a tubing, upper and lower pump barrels connected in said tubing,

a standing valve below said lower barrel, pumpplungers in said barrels, a hollow rod connecting said plu'ngers, a casing outside said pump barrels and tubing means closing the space between said tubing and casing between said pump barrels, there being a pas' sage for liquid between said plungers inside said tubing', and means .to conduct said liquid into said lower pump barrel at a point spaced above said standing valve.

7 .y In a device of the character described including a well casing, a well tubing therein, a pump barrel on said tubing, a standing valve in said barrel, a packer closing the space between said tubing and casing above said standing valve, a plunge-r in said pump barrel, said pump barrel having an opening therein above said standing valve, a .solid sucker rod on said plunger and means to al# low the flow of flushingv fluid from within said casing past said packer and into said opening to clear said pump barrel.

8. In a device of the character described including a well casing, a well'tubing therein, a pump barrel on said tubing, a standing valve in said barrel, a packer closing the space between said tubing and casing above said standing valve, a plunger in said pump barrel, said pump barrel having an opening therein above r.said Vstanding' valve, a solid sucker rod on said plunger, saidbarrel havingopenings therein aboveand below said packer and e tube connecting the lower of said last named openings with the said opening,` above said standing valve.

9. n a device of the character described in @hiding e well Casing, a Well tubingtherein, a puinp barrel on said tubing, a standing valve in said barrel, a packer closing the space between Said tubing and Casing above said standing valve, a sucker rod, plungers thereon above and' below said packer, .Said pump 10 barrel havingun opening therein above said standing Valve and inea-ns to conduct flushingriuid from Within said Casing to said open.- ing in the manner described.

In testimony whereof I hereunto my 15 signature this l2 day of April, A. D. 1928.

JOHN H. HERMAN. 

